hi prachi, your age is very tender, and you have to know about your body and m-cycles , as 1st 7 days after the last day of periods are safe so u don't require the emergency contraceptive
pills during this period, and during unsafe period use barrier contraceptives like condoms or female condoms plus some spermicidal if not allergic . the pill you took have some adverse effects like mood swings , abdominal pain
and irregular bleeding. so i advice you to visit a specialist, not only for your condition but to know your body better, hope i satisfy your query , take care..